Device for mounting rotors, in particular articulated shafts, in a balancing machine

Abstract

A device for mounting rotors, in particular articulated shafts, in a balancing machine has a bearing frame and a frame upper part, which is mounted on the bearing frame so as to be able to oscillate via spring bars and includes a spindle for rotatable mounting of a rotor. The frame upper part is mounted on the bearing frame via groups of spring bars, the groups being arranged at a distance from the axis of rotation of the spindle and at a distance from one another, and the longitudinal axes of the spring bars forming the spring bar groups being oriented parallel to the axis of rotation of the spindle. The spring bars forming the spring bar groups have an elongated, slender shape such that their rigidity in an axial direction is at least 100 times, in particular at least 300 times, greater than their radial flexural rigidity.

1. A mounting device for mounting articulated shafts to be balanced in a balancing machine comprising a bearing frame and a frame upper part, which is mounted on the bearing frame so as to be able to oscillate via spring bars and includes a rotor mount having a horizontally arranged axis of rotation and adapted for rotatable mounting of one end of a horizontally arranged articulated shaft to be balanced in said balancing machine, and a motor for rotatably driving the rotor mount, wherein the spring bars are aligned parallel to the axis of rotation of the rotor mount and equal numbers of the spring bars are arranged in each one of two parallel vertical planes which are arranged on opposite sides of and at identical distances from the axis of rotation of the rotor mount, wherein the spring bars of one plane are arranged so as to be symmetrical to those of the other plane and at least two groups of at least two spring bars, one at a distance from the other, are provided in each plane and each spring bar has an elongated, slender shape such that its rigidity in the axial direction is at least 100 times greater than its radial flexural rigidity. 
     
     
       2. The mounting device according to  claim 1 , wherein the rigidity of each spring bar in the axial direction is at least 300 times greater than its radial flexural rigidity. 
     
     
       3. The mounting device according to  claim 1 , wherein the frame upper part is supported on the bearing frame via mutually spaced groups of spring bars comprising a plurality of spring bars parallel to the axis of rotation. 
     
     
       4. The mounting device according to  claim 1 , wherein the individual groups of spring bars are part of a one-piece metal sheet, the individual spring bars being formed by parallel slots penetrating the metal sheet and connected to one another at their ends via unslotted portions of the metal sheet. 
     
     
       5. The mounting device according to  claim 1 , wherein a torque support is provided, which connects the frame upper part to the bearing frame and in that the torque support has low rigidity in a radial direction with respect to the axis of rotation, but high rigidity when loaded as a result of twisting of the frame upper part. 
     
     
       6. The mounting device according to  claim 5 , wherein the torque support includes two parallel first spring bars, which are attached to the frame upper part at one end and to a flexurally rigid center part at the other end, as well as two parallel second spring bars, which extend transversely to the longitudinal direction of the first spring bars and are attached to the center part at one end and to the bearing frame at the other end. 
     
     
       7. The mounting device according to  claim 6 , wherein the first and second spring bars and the center part are cut in one piece from a metal sheet. 
     
     
       8. The mounting device according to  claim 1 , wherein the frame upper part has a rotatably mounted spindle with a chuck to secure an end of a rotor, and a motor to rotatably drive the bearing spindle.